One possible plot development is that Nagato and Naruto form an alliance to take on a new, greater threat. This threat could be an ancient evil that requires both Nagato's power and Naruto's spirit. Another development could be Nagato using his abilities to help Naruto unlock new powers or forms. For example, he might help Naruto better understand the Sage of Six Paths' power within him.
In the fanfic, there could be a plot where Nagato helps Naruto in rebuilding Konoha. Nagato's power can be used for construction and restoration. He could also teach Naruto some of the secrets of the Uzumaki clan that he might have known, which would give Naruto an edge in future battles. And perhaps, Nagato's presence causes a shift in the political landscape of the ninja world as different villages react to their alliance.
A possible plot development is that Nagato's act of helping Naruto causes a rift among the shinobi world. Some may see it as a threat while others may see it as a chance for a new era of peace. Nagato could also be the key to Naruto finally understanding the true nature of the tailed beasts and their connection to the Sage of Six Paths. This could lead to Naruto being able to communicate with all the tailed beasts more effectively and use their combined power in a new way.
Chapter 117, "Teng Jiao Saliva and Poison Source [Combined Chapters]", is the clearest early answer because it turns Camp Supply Station's situation into a concrete plot event. The chapter turns that into something concrete by moving from Although Xia Hong understood this principle, he had no way to improve... to Inside that meat, there was a pure white round pearl, emitting a....
Chapter 148, "Mysterious Visitor, Deciphering the Cold Resistance Level [Vote for Monthly Pass]", is the clearest early answer because Redwood Ridge finally turns buildup into a real advancement. It opens with After introducing himself, he showed a hint of helplessness, cupped... and closes on He already knew what I intended to say before I finished speaking!.
Chapter 199, "Good News Keeps Coming for the Hong Gang Family (Part 3)", is the clearest early answer because it turns Zhao Long's situation into a concrete plot event. A useful checkpoint is the way the scene starts with But the reality is not like that at all. and follows through with Waiting for the camp to have a new Cold Resistance Level....
Chapter 14, "The Regular Cast", is the clearest early answer because it turns Cold Beasts's situation into a concrete plot event. The setup is There is a convention among the camps surrounding Redwood Ridge., but the pressure keeps building through If a person hasn't broken through to the Logging Realm by the age of....
Chapter 116, "Great Righteousness, Hunting Flood Dragons, Saliva [Five-in-One Mega Chapter]", is the clearest early answer because it turns Zhao Long's situation into a concrete plot event. A useful checkpoint is the way the scene starts with There are three large trees around, just barely reaching Teng Jiao's... and follows through with As Xia Hong's shout echoed, the three fired their preloaded iron....
Chapter 187, "Lu Sheng, Stealth Harvesting, Humiliation", is the clearest early answer because it turns Great Xia Camp's situation into a concrete plot event. The chapter turns that into something concrete by moving from Disdain, of course, has its reasons. to And actually annexed the Mirror Immortal Camp!. What makes it stick is that the chapter closes with "They definitely were. Those two bags must weigh tens of thousands of pounds.
Chapter 125, "Newborn, Yue Yuan", is the clearest early answer because it turns Cold Resistance Level's situation into a concrete plot event. The setup is As soon as Xia Hong and his group retreated, the area near the..., but the pressure keeps building through A hundred breaths later, within the Arrow Bamboo Forest, He Meng....
Chapter 106, "Expanding Hunting Grounds, Camp Expansion [3-in-1]", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. Early on, Xia Hong made up his mind and quickly gathered Xia Chuan, Luo Yuan,.... By the end, Six months ago, with a Hunting Team composed of fifteen Logging....
Chapter 111, "A Turn of Fate [Triple-length Chapter]", is the clearest early answer because it turns Cold Beasts's situation into a concrete plot event. The setup is Even daring to make a small hole to peek, he didn't dare., but the pressure keeps building through He could only judge based on the noises made by the Cold Beasts above..
Chapter 157, "The Disappearance of the Cold Beast, Breakthrough Tide", is the clearest early answer because Shi Ping finally turns buildup into a real advancement. A useful checkpoint is the way the scene starts with Within five hundred meters of the perimeter, all low-level Cold... and follows through with If we require him to make decisions about everything, then what are....